MKP1847H AC Filtering
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Vishay Roederstein
Revision: 16-Mar-17
9
Document Number: 26067
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Maximum RMS current as function of frequency
T
amb
85 °C; U
n
= 350 V
AC
Maximum RMS current as function of frequency
T
amb
85 °C; U
n
= 480 V
AC
POWER DISSIPATION AND MAXIMUM COMPONENT TEMPERATURE RISE
The power dissipation must be limited in order not to exceed the maximum allowed component temperature rise as a function
of the free air ambient temperature.
The component temperature rise (T) can be measured or calculated by T = P/G:
• T = component temperature rise (°C) with a maximum of 15 °C
• P = power dissipation of the component (mW)
• G = heat conductivity of the component (mW/°C)
MEASURING THE COMPONENT TEMPERATURE
The case temperature is measured in unloaded condition (T
amb
) and loaded condition (T
C
).
The temperature rise is given by T = T
C
- T
amb
.
To avoid thermal radiation or convection, the capacitor must be tested in a closed area from air circulation.
10
100
1000
10000
0.1
1
10
100
10 100 1000 10 000 100 000
Axis Title
1st line
2nd line
2nd line
I
RMS
(A)
f (Hz)
2nd line
1 μF
22 μF
10 μF
10
100
1000
10000
0.1
1
10
100
10 100 1000 10 000 100 000
Axis Title
1st line
2nd line
2nd line
I
RMS
(A)
f (Hz)
2nd line
2 μF
7 μF
HEAT CONDUCTIVITY
DIMENSION (mm)
HEAT CONDUCTIVITY
(mW/°C)
wh l
13.0 23.0 32.0 22
15.0 25.0 32.0 25
18.0 28.0 32.0 30
21.0 31.0 32.0 35
22.0 38.0 32.0 41
21.5 38.5 42.0 52
30.0 45.0 42.0 70
30.0 45.0 57.5 86
35.0 50.0 57.5 100
